{"id":2120739,"url":"https://alion.io/job/criteo-fullstack-software-engineer-app-growth-and-performance","title":"Fullstack Software Engineer – App Growth and Performance","company":{"id":52884,"name":"Criteo","domain":"criteo.com","url":"https://alion.io/company/criteo","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":75,"open_postings":7,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-13T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"middle","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bucharest, Romania"],"countries":["RO"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Angular","optional":false},{"name":"C#","optional":false},{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"JavaScript","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"Scala","optional":false},{"name":"TypeScript","optional":false},{"name":"ASP.NET Core","optional":true}],"status":"live","first_seen_at":"2026-09-17T00:00:00Z","employer_posted_date":"2026-09-17","last_verified_at":"2026-10-13T21:53:43Z","board_verified":true,"closed_at":null,"days_open":26,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":26},"description":"What You'll Do:\nAt Criteo, the CIA team contributes to the broader App initiative and works closely with product and engineering teams across the company to improve and grow Criteo's App product.\nBecause the App product spans multiple systems and teams, the work is not confined to a single service or component. You will join a small, collaborative squad and work wherever the problem leads: from backend services and APIs to data, tracking, configuration, testing, and observability.\nThis is not a role where success is measured only by shipping features in one component. You will make ambiguous problems understandable, identify what limits product performance, and turn your findings into practical solutions with measurable impact.\nInvestigate App performance, reliability, and integration issues, tracing signals across systems to identify root causes.\nUse production data, logs, and metrics to explain behavior, validate assumptions, and measure impact.\nTurn findings into clear recommendations, including options, trade-offs, risks, and expected outcomes.\nBuild and test backend services, APIs, instrumentation, data pipelines, and internal tools to solve complex issues.\nWork across backend services, click tracking, app linking and landing, MMP integrations, attribution, measurement, and observability.\nPartner with Product, Analytics, Technical Services, Operations, and R&D to connect technical work to business outcomes.\nOwn topics end to end by identifying gaps, surfacing risks, coordinating stakeholders, and driving delivery through code reviews and continuous delivery.\nTechnical environment: C#, ASP.NET Core, Angular, TypeScript, APIs, data pipelines, and production observability.\nWho You Are:\n4+ years of experience building and evolving complex production systems.\nStrong backend fundamentals in object-oriented programming, service and API design, testing, and production operations; experience with C#, Java, Python, C++, Scala, or a similar ecosystem.\nAn excellent troubleshooter who can navigate unfamiliar systems, trace issues across components, and identify root causes.\nComfortable using metrics and production data to validate assumptions and guide technical and product decisions.\nTechnical depth combined with curiosity about the business, product impact, and customer outcomes.\nAn interest in the mobile and app ecosystem, including app links, tracking, attribution, privacy, and mobile measurement partners.\nAn ownership mindset, clear communication, and a commitment to simple, reusable, well-tested code and reliable production systems.\nBonus:\nExperience with mobile advertising, app measurement, attribution, or mobile measurement partner integrations.\nFront-end development experience with Angular, React, JavaScript, or TypeScript.\nExperience with observability, production investigations, data analysis, or distributed systems.\nExperience translating Product or UX needs into practical technical solutions.\nWe acknowledge that many candidates may not meet every single role requirement listed above. If your experience looks a little different from our requirements but you believe that you can still bring value to the role, we’d love to see your application!\nWe acknowledge that many candidates may not meet every single role requirement listed above. If your experience looks a little different from our requirements but you believe that you can still bring value to the role, we’d love to see your application!\nWho We Are:\nWe’re Criteo, the Commerce Intelligence Platform. Criteo helps businesses turn shopper signals into commerce outcomes while delivering more relevant experiences for shoppers. We use proprietary commerce intelligence and AI decisioning to drive relevance for shoppers and performance for businesses.\nAt Criteo, our culture is as unique as it is diverse. From our offices across the globe or from the comfort of home, our 3,600 Criteos collaborate together to build an open, impactful, and forward-thinking environment.\nWe foster a workplace where everyone is valued, and employment decisions are based solely on skills, qualifications, and business needs-never on non-job-related factors or legally protected characteristics.\nWhat We Offer:\nWays of working - Our hybrid model blends home with in-office experiences, making space for both.\nGrow with us - Learning, mentorship & career development programs.\nYour wellbeing matters - Health benefits, wellness perks & mental health support.\nA team that cares - Diverse, inclusive, and globally connected.\nFair pay & perks - Attractive salary, with performance-based rewards and family-friendly policies, plus the potential for equity depending on role and level.\nAdditionalbenefits may vary depending on the country where you work and the nature of your employment with Criteo.","description_format":"text","description_chars":4794,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[{"name":"Romania","iso":"RO","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Commerce"],"lifecycle":[{"event":"open","at":"2026-10-08T23:57:27Z"}],"visa":[],"liveness":{"score":39,"band":"fade","label":"Fading","p_open":1,"p_active":0.705,"p_room":0.55,"age_days":26,"expected_fill_days":24,"reasons":["conf:6","velocity","win:tail"],"computed_at":"2026-10-13T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/criteo-fullstack-software-engineer-app-growth-and-performance","json_url":"https://alion.io/job/criteo-fullstack-software-engineer-app-growth-and-performance.json","meta":{"generated_at":"2026-10-13T23:41:11Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":36096,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-14T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":52884},"rest":"https://alion.io/mcp/rest/get_company?id=52884"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcriteo-fullstack-software-engineer-app-growth-and-performance"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fcriteo-fullstack-software-engineer-app-growth-and-performance"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fcriteo-fullstack-software-engineer-app-growth-and-performance"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/criteo-fullstack-software-engineer-app-growth-and-performance\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcriteo-fullstack-software-engineer-app-growth-and-performance"}]}